Apparatus for transforming continuous currents into alternating currents.



E. L. JOSEPH.

NTINUOUS GURRENTS' INTO ALTERNATING GURRENTS. APPLICATION FILED Nova 1,1911.

1,042,446. v Patented 001129, 1912;

,F'myefiioc/E APPARATUS FOR TRANSPORMING 00 2, BHEETSSHEBT 1.

Jim/MR5 E. L..JOSBPH. APPARATUS FOR TRANSFORMING CONTINUOUS GURRENTS INTO ALTERNATING GURBENTS'.

I APPLICATION FILED NOV. 24, 1911. 4 1,042,446. Patented 0011241912.

2 SHEETS-SHEET Z.

HIIIIIHIIII 'nnwaan LIONEL Josnmi, or LONDON, ENGLAND.

arrarwrus roa TRANSFOBMING To all whom it may concern: I

Be it known that I, EDWARD LIONEL JosnPH, a subject of the King of Great Britain, and resident of 96 Victoria street, in the city of Westminster, London, England, managing director, have invented certain new and'useful Improvements in Apparatus for Transformin Continuous Currents into Alternating Jurrents, of which .the following is a specification:

This invention relates to apparatus for transforming continuous currents into in termittent currents of the kind wherein a rotating commutator or distributer secure to the spindle of an electric motor and pro- :videdwith the necessary brushes alternately closes a circuit connected to an extraneous .supply of continuous current through the one or the other of a pair of oppositely wound coils of a transformer. v 7 a -In apparatus constructed in accordance with the present invention, the slip. ring and the commutator are mounted upon, but insulated from, the spindle of the electric motor, while the brushes which bear upon said ring and commutator are similarly mounted on the casin of the motor. The slip ring is provide with automatically 3o actuated and speed-controlled means adapt ed to connect electrically the slip ring with the commutator as soon as the speed of rotation of the motor reaches a predetermined value. I j Y The invention will be described with reference to the accompanying drawings wherein- Figure 1 is a wiring diagram showing the commutator and transformer in schematic 40 form. Fig. 2'is a side view,

. shown insection, of the commutator mounted upon the spindle of an electric motor, and Fig. 3 an end view of the same apparatus.

Referring tothe drawings wherein similar reference fletters indicate corresponding arts, (1 is a. metal slip ring mounted on but insulated from the spindle b of an :electric motor '0. d is a commutator similarly mounted upon the spindle b and consisting preferably of an uneven number of separate Spec'iflcat1on of Letters Patent. Application filed November 24, 1911.

parted to upon the slip ring a.

forming theprimary winding 1 parts being oon'rmuons ouaannrs m'ro smnanarm cuaannrs.

Patented Oct. 29, 1912. Serial No. $62,178.

segments 6 all of which are electrically connected together by a second ring I g are resilient arms each secured at one extremity as at lito the ring a and provided at their other or free extremity with a weight j. When rotatory motion is ima certain predetermined speed has been reached and under the action of centrifugal force, fly out and come into contact with stops 7c integral with ring f and soput the segments e into electrical communication with the slip ring a. v mis a brush insulated from the frame of the electric motor 0 and adapted to press This brush is connected by a wire n and through a fuse 0 to conductor 1) connected to one polarity of a source of continuous current.

and 1'" are a pair of oppositel and insulated brushes respective y connected by wires .9, t to the coils a, 'v forming the primary winding of a transformer The arranged windings are connected together as at w and are furthermore connected by means of ductor, 2) connected to the opposite polarity of the source of current previously referred to.

w is the secondary windin of the transformer 'w provided with w adapted to be connected to the alternating current utilizing devices.

In use, the motor a is first rotated by current supplied to it and thereupon the switch 5 is closed. When the motor has then attained a certain predetermined speed the arms 9 fly out under the action of centrifugal force and electrically connect the slip ring a, with the segments 2. Intermittent continuous currents will then be caused to alternately pass through the coils u, o which will induce true alternatin currents inthe secondary winding of tile transformer. These currents may be used for wireless telegraphy, forthe production of ozone, nitrogen compounds, etc, for vacuum lighting and other apparatus wherein it is either the commutators the arms 9, .when

two coils u and 'v are wound in opposite directions and the free extremities of their i a wire 3/ and through a switch .2 to a conconductors w and fig 1,042,446

essential or desirable to employ alternating from one another, and speed controlled currents Whose values graphically corremeans automatically actuated to electrically 10 spond to a sinusoidal curve. connect the two commutator sections.

Claim: In apparatus for transforming continuous EDWARD LIONEL JOSEPH currents into intermittent currents, a motor Witnesses: driven commutator made up of a sllp T1110 HERBERT D. JAMEsoN, section and a segmental section, insulated O. J. WORTH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

